Titre :

Middle Devonian trilobites of the Saoura Valley, Algeria: insights into their biodiversity and Moroccan affinities.

Auteur(s) :

Crônier, Catherine [Auteur correspondant]
Biogéosciences [UMR 6282] [BGS]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Abbache, Abdelkader [Auteur]
Khaldi, Ahmed Yacine [Auteur]
Oudot, Morgane [Auteur]
Biogéosciences [UMR 6282] [BGS]
Maillet, Sébastien [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Ouali Mehadji, Abdelkader [Auteur]

Titre de la revue :

Geological Magazine

Pagination :

811-840

Éditeur :

Cambridge University Press (CUP)

Date de publication :

2018-05

ISSN :

0016-7568

Mot(s)-clé(s) en anglais :

Trilobita
Eifelian
Ougarta
taxonomy
diversity
variability

Discipline(s) HAL :

Planète et Univers [physics]/Sciences de la Terre/Paléontologie

Résumé en anglais : [en]

Trilobites are important elements of the Devonian macrobenthos; some of them were collected in the Chefar el Ahmar Formation, from two sections located near Béni Abbès in the Saoura Valley (Ougarta Basin, Saharan Algeria). ...
Lire la suite >Trilobites are important elements of the Devonian macrobenthos; some of them were collected in the Chefar el Ahmar Formation, from two sections located near Béni Abbès in the Saoura Valley (Ougarta Basin, Saharan Algeria). This formation is characterized by alternations of claystones and limestones, and it is considered to be late Emsian to early Frasnian in age. Only the lower part of this formation has yielded trilobites so far; their presence has been known for a long time. Phacopines clearly dominate the trilobite assemblages, with Austerops, Barrandeops, Chotecops and Phacops s.l. as the main genera. Two new species are described (Austerops salamandaroides sp. nov. and Phacops ouarouroutensis sp. nov.), while some other taxa are presented in open nomenclature. Comparisons are made with closely allied species. These new trilobite occurrences have been analysed in terms of their intra- and interspecific variability and biodiversity. The occurrence of Struveaspis maroccanica, previously known from the Saoura Valley, provides an early Eifelian age, which is also confirmed by the presence of trilobites Thysanopeltis and Koneprusites, and ostracods Bairdiocypris devonica and Bufina ?subovalis.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Commentaire :

30 pages

Collections :

• Évolution, Écologie et Paléontologie (Evo Eco Paleo) - UMR 8198

Source :

Harvested from HAL